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DLPLCR65EVM: Power Consumption

Timur Ha
Prodigy 110 points
Part Number: DLPLCR65EVM
Other Parts Discussed in Thread: DLP7000, DLPC900, DLP9000, DLP9000X

Hello,

Is it possible to get approximate current consumption of the DLPLCR65EVM board. We are using this board

From the datasheet the power requirements are in Section 5.1 Nominal voltage: 12-V DC; Maximum Current: 7 A; and the recommended power supply is Digi-Key part number 102-3811-ND, which is 5A

The actual current measurement I have made was 0.48A

We are only using display port for imaging and USB for a control

Best regards,

Timur

  • 0
    TI__Mastermind 47395 points

    Hello Timur,

    The part chosen for the recommended power supply works for both the dual and single controller EVM.  You could very likely get away with a lower amperage supply.  Be aware that there is current during operation and during initialization and shutdown.  Initialization does require more current than when running. 

    I recommend using a good lab bench supply and measure the power requirements during all phases of operation.

    If you do measure during initialization, you need a system that can actually see the transient behavior.  A voltmeter will not see the necessary transients.  Each system is slightly different and will depend on what peripheral circuits you have designed in, added, or removed.

    Fizix

  • 0 in reply to Fizix
    Prodigy 110 points

    Hello Fizix,

    Thank you for your reply. I will make a measurements of transients

    Do you have any data on how much current it takes during the initialization?

    Also do you have any data how much current takes modules, as we are no utilising EVM at a full capabilities, therefore we just wanted to get an exact figure for the current (theoretical)?

    Best regards,

    Timur

  • 0 in reply to Timur Ha
    TI__Expert 3700 points

    Hi Timur,

    We will check with the team here in Dallas on the current at initialization. My recollection is that it is nominally in the 950-1000 mA range, but please give us a few days to gather this information.

    We do not have current measurements for individual modules. Since the EVM is designed for check out of our technology by the customers and not meant for "drop-in" production, we focus on measurements for the entire design.

    We will get back to you soon on the initialization data.

    Regards,

    Matt

  • 0 in reply to Matt Soucek
    Prodigy 110 points

    Hello Matt,

    I see. Thank you for the support and I will wait for your response

  • 0 in reply to Timur Ha
    TI__Expert 3700 points

    Thanks Timur.

    I have reached out to our characterization team for the information.

    Regards,

    Matt

  • 0 in reply to Matt Soucek
    TI__Expert 3700 points

    Hi Timur,

    Thanks for your patience. We just wanted to confirm the measurements before sharing.

    For your design, you should plan for a maximum value of current of 1660 mA. This is in the datasheet as I (total) in section 6.6 Electrical Characteristics:

    Total dynamic current will be below 1660mA because in the system Vdd and Vddi are connected together. 

    Please let us know if you have further questions.

    Thank you,

    Matt

  • 0 in reply to Matt Soucek
    Prodigy 110 points

    Hello Matt,

    Thank you for the information

    I will make a setup next week and make some measurements.

    Will the current consumption be the same for DLP7000?

    Best regards,

    Timur

  • 0 in reply to Timur Ha
    Prodigy 110 points

    I have found from datasheet, is it a summation of all current =1,950mA

  • 0 in reply to Timur Ha
    TI__Expert 3700 points

    Hi Timur,

    Yes, you are looking in the correct location of the DLP7000 datasheet. Again, let me double check internally here.

    This device is very different than the DLP6500: fewer mirrors, higher voltages, different package, etc.

    Will get back to you soon.

    Regards,

    Matt

  • 0 in reply to Matt Soucek
    Prodigy 110 points

    Hello Matt,

    Thank you for your support

    Will wait for your response

    Best regards,

    Timur

  • 0 in reply to Timur Ha
    TI__Expert 3700 points

    Hi Timur,

    For the DLP7000, you can focus on the values for VCC and VCCI and the corresponding ICC and ICCI. The total max value would then be 1875 mA.

    Regards,

    Matt

  • 0 in reply to Matt Soucek
    Prodigy 110 points

    Hello Matt,

    Thank you

  • 0 in reply to Timur Ha
    TI__Expert 3700 points

    Hi Timur,

    Hope you have a good weekend!

    Matt

  • 0 in reply to Matt Soucek
    Prodigy 110 points

    Hello Matt,

    We are planning to use for a new revisions DLPC900 DMD

    What would be the current consumption? Is it 2368mA, 1005mA or 3373mA?

    Also I just realised that those current are for the Vcc values, therefore from the input power supply on the evaluation board it should be less, as it has a 12V input and then drops to Vcc values?

    Best regards,

    Timur

  • 0 in reply to Timur Ha
    TI__Expert 3700 points

    Hello Timur,

    The datasheet you shared shows the current levels for the controller by itself. The current consumption will vary by temperature, voltage, resolution, and frame rate. 60Hz will have lower current levels vs. 120Hz. This controller drives many different resolutions, so lower resolution devices consume less current and power. 

    The max levels are in the datasheet to take into account all of the variables, even though the nominal levels might be less. For example, based on internal data, the three current levels add up to 1900 mA for 1080p @ 120 Hz. However, for a production system, you should plan to support higher levels and to take into account device, board, and operational variables.

    On the EVM, the controller will most likely consume similar current levels. Fizix replied earlier on how to make the measurements for the evaluation board. Please let us know if you need more feedback on that.

    Regards,

    Matt

  • 0 in reply to Matt Soucek
    Prodigy 110 points

    Hello Matt,

    Sorry I've been looking at a different part (just got confused with naming)

    Here is a Electrical Characteristics of DLP9000

    Which current I need to consider using for the total current consumption?

    Best regards,

    Timur

  • 0 in reply to Timur Ha
    TI__Expert 3700 points

    Hi Timur,

    The DLP9000 is built with similar technology to the DLP6500, which means you will have to account for the values for VCC and VCCI and the corresponding ICC and ICCI maximums. 

    You can also see that for the DLP9000X operating at higher frequencies, the currents are higher.

    Regards,

    Matt

  • 0 in reply to Matt Soucek
    Prodigy 110 points

    Hello Matt,

    Thank you for the information

    Best regards,

    Timur

  • 0 in reply to Timur Ha
    TI__Expert 3700 points

    You are welcome Timur.

    Hope you have a good day.

    Regards,

    Matt